Notes on re-generating gnomaAD if needed.

docs/Software_installation.md

@@ -39,7 +39,12 @@ DATE=`date +%Y%m%d%H%M`
 /home/u035/project/software/bcbio/tools/bin/bcbio_nextgen.py upgrade -u skip --datatarget vep &> bcbio_install_datatarget_vep_${DATE}.log
 ```
 
-We already had gnomAD 3.0 compiled and downloaded from another bcbio installation, so this gets copied to /home/u035/project/software/bcbio/genomes/Hsapiens/hg38/variation.
+We already had gnomAD 3.0 compiled and downloaded from another bcbio installation, so this gets copied to /home/u035/project/software/bcbio/genomes/Hsapiens/hg38/variation. However, if needed, re-generate it like this. It will take about 6 days.
+
+```
+DATE=`date +%Y%m%d%H%M`
+/home/u035/project/software/bcbio/tools/bin/bcbio_nextgen.py upgrade -u skip --datatarget gnomad &> bcbio_install_datatarget_gnomad_${DATE}.log
+```
 
 Increase JVM memory for GATK in galaxy/bcbio_system.yaml